<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<style>
#ad_html_div1{
	width:100%;
	height: 100px;
	background-color: blue; 
}
#ad_html_div2{
	width:100%;
	height: 100px;
	background-color: red;
}
#ad_html_div3{
	width:100%;
	height: 100px;
	background-color: black;
}
</style>
<body>
<div id="ad_html_div1"></div>
<div id="ad_html_div2"></div>
<div id="ad_html_div3"></div>
</body>
</html>